Question

The contact angle between a solid and a liquid is a property of?

• A. the material of the solid
• B. the material of the liquid
• C. the shape of the solid
• D. the mass of the solid

Answer 1

Answer: (A), (B)

The correct options are
A

the material of the solid

B

the material of the liquid

due to adhesive forces, a liquid may rise up in a capillary tube or fall down, depending upon the contact angle between them.
So, it is a type of materials in contact and this decides the contact angle.
Hence it is a property of materials in contact i.e., solid & liquid